P103E 2017 GMC Sierra Code - Auxiliary Coolant Pump Control Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Auxiliary Coolant Pump Control Module, Auxiliary Coolant Pump Control Module harness is open or shorted, Auxiliary Coolant Pump Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P103E 2017 GMC Sierra indicates Auxiliary Coolant Pump Control Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Auxiliary Coolant Pump Control Module, Auxiliary Coolant Pump Control Module harness is open or shorted, Auxiliary Coolant Pump Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P103E 2017 GMC Sierra Description
What are the Possible Causes of the DTC P103E 2017 GMC Sierra?
- Faulty Auxiliary Coolant Pump Control Module
- Auxiliary Coolant Pump Control Module harness is open or shorted
- Auxiliary Coolant Pump Control Module circuit poor electrical connection
How to Fix the DTC P103E 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P103E 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P103E 2017 GMC Sierra Code
1. What does the OBDII code P103E mean on a 2017 GMC Sierra?
Code P103E indicates an issue related to the Auxiliary Coolant Pump Control Signal Message Counter being incorrect, which may point to a communication or signal error between the auxiliary coolant pump and the vehicle’s control module.
2. What are the common symptoms of code P103E in a 2017 GMC Sierra?
Symptoms may include an illuminated check engine light, reduced cooling performance, overheating during heavy loads or idling, and possible issues with cabin temperature control.
3. What causes the P103E code to appear on a GMC Sierra?
Common causes include a malfunctioning auxiliary coolant pump, faulty wiring or connectors in the pump circuit, a defective powertrain control module (PCM), or software-related communication errors.
4. Can I drive my 2017 GMC Sierra with a P103E code?
It’s not recommended to drive for extended periods with this code, as it may lead to engine overheating or reduced cooling system efficiency, potentially causing further damage.
5. How is the P103E code diagnosed?
A technician will typically use a scan tool to verify the code, inspect the wiring and connectors for damage, test the auxiliary coolant pump for proper operation, and check for any software updates for the PCM.
6. What repairs can fix the P103E code on a GMC Sierra?
Repairs may include replacing the auxiliary coolant pump, repairing or replacing damaged wiring or connectors, updating the PCM software, or in rare cases, replacing the PCM if it is faulty.
7. How much does it cost to fix the P103E code on a 2017 GMC Sierra?
Repair costs can vary depending on the exact issue but typically range from $150 to $500, including parts and labor, with auxiliary coolant pump replacement being on the higher end.
8. Can a software update resolve the P103E code?
Yes, in some cases, a PCM software update can resolve communication errors and clear the P103E code without requiring hardware replacements.
9. How do I prevent the P103E code from returning?
Regular maintenance, checking the coolant system for leaks or blockages, and ensuring all electrical connections are secure can help prevent the code from reoccurring.
10. Does the P103E code affect fuel economy on a GMC Sierra?
While this code primarily affects the cooling system, it could indirectly impact fuel economy if the engine operates less efficiently due to overheating or thermal management issues.
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